5.0.0-beta.2 · Published beta · 13f4954c. Published on npm. Match your installed version.
MaintainersBrowser contract matrix#
This finite v5 browser inventory closes the platform-specific scope of
#145. The release profile
pins Chromium, Firefox and WebKit through Playwright; it does not promise an
untested minimum browser version. config/release-validation.json enumerates
46 named cases and requires each on all three engines, with no skipped or
flaky cases accepted for certification.
| Accepted workflow | Browser evidence | Complementary evidence |
|---|---|---|
| Detached roots and foreign owner documents | attachment-owner-document.spec.mjs |
Source, distributions and installed attachment fixtures |
| Portable TypeScript starter, Vite code replacement, pending cancellation and authored source maps | starter-development.spec.mjs |
Relocated candidate kit; npm ci, typecheck, lint, tests and production build |
| Removal-only collection changes, surviving identity/focus/drafts, explicit roots and optimized rendering | collection-removal-survivors.spec.mjs, data-package.spec.mjs |
Native data and CollectionView public unit suites; installed data and optimized-child fixtures |
| Focus/blur capture, target delegation and undelegation | event-delegator-focus.spec.mjs |
EventDelegator unit contracts |
| Region replacement, placeholder restoration, detach/adopt and subsequent-owner cleanup | ownership-boundaries.spec.mjs |
Region and View ownership unit suites |
| Behavior and host delegation across render, direct Behavior destruction and host teardown | ownership-boundaries.spec.mjs |
Behavior initialization, entity events and cleanup unit suites |
Native Error identity and usable stack with/without captureStackTrace |
ownership-boundaries.spec.mjs |
Diagnostic catalog and error unit contracts |
| Native, jQuery, morphdom and lit-html DOM behavior, stable roots, attach/detach and destruction | dom-adapters.spec.mjs, adapters-package.spec.mjs |
Shared test/contracts/dom-adapters.js and installed adapter fixtures |
| Explicit root attribute refresh, null removal and undefined preservation | view-render-attributes.spec.mjs |
Root attribute unit and installed package contracts |
| Labeled form controls, keyboard/focus behavior and safe text output | docs-form.spec.mjs, beta-starter.spec.mjs |
Executable documentation fixtures; this is not an accessibility audit of a real application |
| Async Application cancellation/restart and borrowed/owned state cleanup | Browser performance lifecycle/state workloads | Held-promise public unit and bounded model-based suites; JS scheduling contracts do not require a duplicate browser test for every transition |
The three added ownership/error cases passed all nine engine combinations on 2026-09-09 using the pinned profile. Full matrix and exact-tarball validation are reported by the accompanying PR and final release certificate; this page does not turn a focused test run into a complete release result.
The inventory covers accepted platform-dependent contracts. It does not add Shadow DOM, SSR/hydration, synchronous recovery, a new resource registry, or arbitrary third-party widget behavior. Such additions need a consumer contract before they can create a release gate. Garbage-collection observations are separate from successful teardown; see performance evidence.